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Additive manufacturing (AM) has emerged over the past years as a key technology in aircraft structural components’ manufacturing. This paper aims to describe the numerical analysis and experimental testing of five wing ribs with different 2D topologies manufactured with polylactic acid (PLA) using the fused deposition modeling technology. The main purpose is to determine the best wing rib topology in terms of strength, stiffness and mass.

Numerical analyses are performed using Ansys Workbench’s static structural analysis for two distinct loading cases. In the first loading, the chord-wise distributed load, resulting from wing lift, is replaced by two equivalent concentrated loads at the leading and trailing edges. This simplification allows the numerical results to be experimentally validated. The second loading has distributed loads applied on the upper and on the lower surfaces of the wing rib to produce a more realistic structural response. Experimental tests are performed with the first loading case to determine maximum displacement and failure loads of the wing ribs studied. SEM is used to analyze fracture surfaces.

From the five different PLA printed wing rib topologies studied, it is found that truss type configurations are the more structural efficient, that is, truss topologies exhibit better specific strength and specific stiffness. Additionally, the limiting factor in the design of these wing ribs is stiffness rather than strength.

The work identifies the kind of structural topologies that are best suited for 2D wing ribs obtained by AM and leads the way to more complex and more efficient structural layouts to be explored in the future using topology optimization coupled with simple Finite Element Analysis (FEA).

The purpose of this paper is to generate optimised trajectories for an unmanned aerial vehicle (UAV) during a forest fire detection mission. It is assumed that the UAV flies 3D curvature-constrained Dubins manoeuvres and has a limited amount of battery energy that prevents it from covering the entire search area in a single trip.

In this paper, the search area is discretised into a grid of multiple targets, and each target assigned with a score that is proportional to the time elapsed since the last UAV visit. This problem, known as Dubins Airplane Orienteering Problem, consists of finding the number and order of targets to visit and the UAV heading at each target that maximises the total trip score without exceeding the UAV battery energy. The solution is found using the Randomised Variable Neighbourhood Search metaheuristic. All target scores are updated after each trajectory generation according to the elapsed time since the last UAV visit.

The proposed approach produced feasible results when generating optimised trajectories for a fire detection mission context where energy battery constraints are important.

The authors carry out the planning of UAV missions with limited amounts of onboard energy such as a real fire detection mission using a single electric propulsion and fixed-wing UAV.

This paper introduces an energy-based approach to the Dubins Airplane Orienteering Problem, which takes into account the UAV performance and energy budget when generating optimised trajectories.

BRITISH librarians are interested in the recollections of the Director of the University of Wyoming, in Laramie, to this country as a “Fulbright” visitor recently as recorded in that excellent house journal, the Wilson Library Bulletin (May, 1954, pages 767–71). Dr. Orwin Rush came with Mrs. Rush and a family of four children. He is appreciative of the spirit shown by “the determination of a great people to live by those beliefs and ideals which have meant so much to the free peoples of the world” and he tells of the marks the war years have left upon us still. There were, too, the personal restrictions we accepted; the tiresomeness of our government controlled radio, the patient queueing for rationed goods—just thirteen queues to shop for one ordinary meal—the “no standing on the bus,” the formal waiting for interviews, much of it mere tedium inflicted by arrogance, and much more; especially the drab school uniforms the children were forced to wear—“no jewelry allowed to be worn either by my fourteen‐year‐old daughter who was in a public school, or my five‐year‐old daughter in a private school.” Some very variable customs are regarded as universal, e.g., “the British have been eating porridge for breakfast for centuries and like it.” Universal, however, was our interior heating; “my experience in trying to heat an English house with open fires has convinced me that it is a necessity for Englishmen to sip a lot of hot tea.” We have never admitted as a race that our climate is other than temperate. Possibly this summer of 1954 has modified our view and established that the only certain truth about the weather is, “it won't last.”

This paper aims to focus on the evolution of nonprofit cultural institutions in Mexico and their relationship with Spain, regarding the four traditional elements of a marketing mix. Specifically, this paper examines marketing advancements in the digital environment, placing emphasis on the virtual exhibition Códices de México: Memorias y Saberes, as well as the marketing activities related to prehispanic and novohispanic codices between 2010 and 2022.

The first part of the present study provides a chronological framework based on the four components of a marketing mix, illustrating the transition of Mexican and Spanish public cultural institutions from their foundations to current times. It particularly provides insight into their recent accomplishments in the digital environment, underscoring potential networking areas. The second part offers an in-depth examination of the exhibition Códices de México: Memorias y Saberes (INAH 2015) and a review of digital sources from Mexican government entities to investigate marketing activities related to prehispanic and novohispanic codices.

Due to the historical approach used to document the transition of nonprofit cultural institutions in Mexico and Spain to the digital era, this article sheds lights on co-joint efforts in the digital marketing domain around prehispanic and novohispanic codices. Additionally, it illustrates the activities used by Mexican cultural institutions during the past two decades to disseminate knowledge on codices.

Regarding the methodological aspects of using historical resources through digital archives, this study solely comprised marketing activities reported in the records available on the official portal of cultural institutions.

This study argues for the utility of the four components rooted in a traditional marketing mix as a tool to illustrate the evolution of marketing practices within the cultural heritage domain. It also highlights the role played by cultural institutions in Mexico and Spain in the digital environment to strategically network around cultural heritage. Additionally, it sheds light on the implementation of methods for presenting Mexican codices grounded in virtual terrain.

The purpose of this paper is to analyze some barriers and the “drivers of localism” during the long-term disaster recovery process. The main question is: what types of discourses and practices about localism are being heard and revealed in the frontline?

Fieldwork, which was conducted from January 2010 to June 2013, consisted of participant observation and qualitative data collection. The authors opted for an approach that privileges narrative and observation, dialoguing with participants to gather local knowledge and information. Data were analyzed in light of the disaster recovery literature, focusing on disaster recovery as an expression of power relations.

Localism has been framed in diverse ways according to the interests of social groups placed in contextual meanings and, sometimes, in different phases of risk and disaster management. One important driver of localism is disaster narrative framing that allowed identification of how localism is composed, by whom and how.

One important aspect that needs further research is longitudinal studies to investigate how the barriers are changing between the generations, and how intergenerational dialogues can be promoted to sustain long-term participation and localism.

This study recommends the need to identify who is talking about the importance of local and how localism has been framed in policy and action. It is important to empower localism in order to provide ways for local people sharing what is going on in the frontline. But it is also essential to provide funding and means of implementation for local initiatives regarding advocating, researching and proposing disaster recovery interventions led by people.

Human and artificial intelligence has often been examined through competitive and oppositional lenses, which may no longer suffice in modern digital and knowledge-based societies. This paper advocates for a holistic perspective by integrating human and artificial intelligence within the conceptual framework of intellectual capital (IC).

Employing a deductive approach rooted in systems theory, this study reinterprets established dimensions of IC for the era of artificial intelligence.

Drawing inspiration from the Information Variety Model and the 4C Curve Model, both developed within the research framework of the Viable Systems Approach, a conceptual framework is proposed to transcend fragmented perspectives. It aims to provide researchers and practitioners with a comprehensive understanding of human–artificial intelligence relations within the realm of IC.

This paper contributes to the ongoing discourse on the potential evolution of IC in the era of artificial intelligence by presenting a multidisciplinary framework that challenges reductionist perspectives. It underscores the importance of systems thinking in reframing, analyzing and discussing key dimensions of IC in the context of the artificial intelligence era.

The technique of cross-docking is attractive to organisations because of the lower warehousing and transportation (consolidated shipments) costs. This concept is based on the fast movement of products. Accordingly, cross-docking operations should be monitored carefully and accurately. Several factors in cross-docking operations can be impacted by uncertain sources that can lead to inaccuracy and inefficiency of this process. Although many papers have been published on different aspects of cross-docking, there is a need for a comprehensive review to investigate the sources of uncertainties in cross-docking. Therefore, the purpose of this paper is to analyse and categorise sources of uncertainty in cross-docking operations. A systematic review has been undertaken to analyse methods and techniques used in cross-docking research.

A systematic review has been undertaken to analyse methods and techniques used in cross-docking research.

The findings show that existing research has limitations on the applicability of the models developed to solve problems due to unrealistic or impractical assumption. Further research directions have been discussed to fill the gaps identified in the literature review.

There has been an increasing number of papers about cross-docking since 2010, among which three are literature reviews on cross-docking from 2013 to 2016. There is an absence of study in the current literature to critically review and identify the sources of uncertainty related to cross-docking operations. Without the proper identification and discussion of these uncertainties, the optimisation models developed to improve cross-docking operations may be inherently impractical and unrealistic.